基于RDMA操作的MPI-2单边通信的设计与实现

Design and implementation of MPI-2 one-sided communication based on RDMA operations

MPI-2单边通信存在很高的通信开销以及对通信进程中远程进程的依赖。为此提出了在InfiniBand体系结构上的高性能MPI-2单边通信设计方法。其中,MPI-2单边通信操作,比如MPI_Put,MPI_Get以及MPI_Accumulate将对应于InfiniBand远程直接内存访问(Remote Direct MemoryAccess,RDMA)操作。设计是基于MPICH2的在InfiniBand上的应用,可以很好地实现通信和计算的重叠处理。

Many existing MPI-2 one-slded communication implementations are built on top of MPI send/recelve operations. Although this approach can achieve good portability, it suffers from high communication overhead and dependency on remote process for communication progress, To solve these problems, a high-performance MPI-2 one-sided communication design was proposed over the InfiniBand architecture. In the design, MPI-2 one-sided communication operations such as MPI_Put, MPI_Get and MPI_Accumulate were directly mapped to InfiniBand Remote Direct Memory Access （RDMA） operations.